Helmet visor screw



FIG. 1 is a perspective view of a helmet visor screw showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevation view thereof;

FIG. 4 is a bottom view thereof; and,

FIG. 5 is a sectional side elevation view thereof, taken at line 5-5 of FIG. 2.

The broken lines in the drawings illustrate portions of the helmet visor screw and form no part of the claimed design. 

CLAIM The ornamental design for a helmet visor screw, as shown and described. 